Comp Cams "Xtreme Energy Cams" are the latest series of hydraulic and hydraulic roller cams to take advantage of the newest development of camshaft design and valve train technology. They have an aggressive lobe design that produces better throttle response than other cams with the same duration and they still deliver strong engine vacuum. "Xtreme Energy Cams" can be used for any street or street/strip application where both top end horsepower and good throttle response are desired.